Veichi AC100-T3-1R5G Manual page 139

AC100 HIGH-PERFORMANCE VC INVERTER MANUAL
Tip: When PID is used for frequency source given, [F0.03 = 8] preset outputs 100.0% corresponding maximum
output frequency; when PID is used for the frequency voltage separation and outputs voltage source; [F0.26 =
5] preset outputs 100.0% corresponding motor rated voltage.
Fb.08 Proportional gain: P
Fb.09 Integral time: I
Fb.10 Differential gain : D
The parameter value controlled by PID should be set according to the actual characteristics of the system.
Proportional gain P: It decides the impact of P act to bias. Response is quicker when gain is bigger. But there will be
surge when it is too big. Response is slower when gain is smaller.
Integral time I: It decides the effect of act I. Response is slower and control ability for out disturbance is weaker when
integral time increases. Response is quicker when integral time is small. But there will be surge if it is too small.
Differential gain D: When bias of PID feedback and PID given is changing, it adjusts change rate of output and bias
pro rata. It is only related to direction and size of bias change, not related to direction and size of bias itself. Be careful
when using since it easily magnifies the disturbance, especially high changing frequency.
Fb.11 Sampling period
It is only valid for PID feedback sampling period. Adjust and calculate once in every sampling period. Response is
quicker when sampling period is smaller.
Fb.12 PID control deviation limit
When feedback is in this range, PID adjustment stops. Output does not change; the reasonable use of the feature helps
coordinate the contradiction between system output accuracy and stability
Setting range: 0.00-100.00
Setting range: 0.01-10.00s
Setting range: 0.00-10.00s
Setting range: 0.01-100.00s
Setting range: 0.0-100.0%
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FUNCTION PARAMETER SPECIFICATION
Factory default: 1.00
Factory default: 0.10s
Factory default: 0.00s
Factory default: 0.10s
Factory default: 0.0%
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